Business Segment Information (Schedule of Total Revenue Percentages Contributable to Specific Government Agencies) (Detail) - Government Contracts Concentration Risk	11 Months Ended	12 Months Ended
Jan. 01, 2016	Jan. 30, 2015	Jan. 31, 2014
US DoD
Segment Reporting Information [Line Items]
Percentage of sales	64.00%	67.00%	68.00%
U.S. Government
Segment Reporting Information [Line Items]
Percentage of sales	76.00%	79.00%	78.00%
U.S. Army
Segment Reporting Information [Line Items]
Percentage of sales	14.00%	16.00%	19.00%
Maryland Procurement Office
Segment Reporting Information [Line Items]
Percentage of sales	10.00%	10.00%	8.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration